Assertion (A): KMnO4 acts as an oxidizing agent in acidic, basic, or neutral solutions.
Reason (R): It oxidizes ferrous sulfate to ferric sulfate.
a) Both assertion and reason are true, and reason is the correct explanation of the assertion.
b) Both assertion and reason are true, but reason is not the correct explanation of the assertion.
c) Assertion is true, but reason is false.
d) Assertion is false, but reason is true.